.b-content{
    background-color: #ffffff;
    display: flex;
    flex-direction: column;
    width: 100%;
    
}
.b-title{
    padding: 20px 30px;
    font-size: 20px;
    color: #303133;
}
.b-header{
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}
.b-quit{
    border: 1px solid #DCDFE6;
    color: #606266;
    margin-right: 30px;
    height: 28px;
    line-height: 28px;
    margin-top: 20px;
    width: 60px;
    text-align: center;
    border-radius: 6px;
}
.b-quit:hover{
    border: 1px solid #409EFF;
    cursor: pointer;
}
.book-detail{
    display: flex;
    flex-direction: row;
    margin: 5px 30px 10px 30px;
    border: 1px solid #DCDFE6;
    padding: 15px 20px 15px 0px;
    border-radius: 6px;
    
}
.cover-box{
    height: 90px;
    margin-right: 10px;
}
.cover-img{
    height: 90px;
}
.book-info{
    display: flex;
    flex-direction: column;
   
    height: 90px;
    margin-right: auto;
}
.bookname{
    font-size: 16px;   
    line-height: 30px;
    color: #303133;
}
.author-and-press{
    color: #606266;
    font-size: 12px;
    line-height: 20px;
}
.nums{
    display: flex;
    flex-direction: row;
    color: #606266;
    line-height: 20px;
}
.num{
    font-size: 12px;
    margin-right: 30px;
}
.introduction{
    line-height: 20px;
    color: #606266;
}
.use-data{
    display: flex;
    flex-direction: column;
    height: 76px;
    margin-top: 7px;
    border: 1px solid #DCDFE6;
    box-shadow:0px 0px 3px 2px #f2f2f2;
    width: 140px;
    border-radius: 6px;
    
}
.use-data-title{
    line-height: 30px;
    padding-left: 10px;
    color: #606266;
    font-size: 12px;
}
.use-data-num{
    line-height: 46px;
    font-size: 20px;
    padding-left: 10px;
    color: #409EFF;
    font-size: 26px;
}
.chapters{
    display: flex;
    flex-direction: column;
    margin-left: 30px;
    width: calc(100% - 60px);
    margin-top: 20px;
    border: 1px solid #DCDFE6;
    border-radius: 6px;
}
.chapter-title{
    display: flex;
    flex-direction: row;
    width: 100%;
    height: 50px;
    color: #303133;
}
.chapter-title > div{
    line-height: 50px;
    text-align: center;
}

.chapter-item{
    display: flex;
    flex-direction: row;
    height: 45px;
    border-top: 1px solid #DCDFE6;
}



.bd-options{
    line-height: 45px;
    display: flex;
    flex-direction: row;
    justify-content: center;
}
.b-margin{
    margin-right: 10px;
}
.option-icon{
  color: #409EFF;
}

.b-detail{

    display: flex;
    font-size: 15px;
    flex-direction: row;
    align-items: center;
    justify-content: center;
}

.chapter-item:hover{
    background-color: #f6f6f6;
}